Interlocking brick.



P. YENGST.

INTERLOGKING BEIGK.

AAAAAAA TION FILED OCT. 14, 1909.

- 989,467, Patented Apr. 11, 1911.

PHILIP YENGST, OF NEW YORK, N. Y.

INTER/LOCKING BRICK.

osaae'r.

Specification of Letters Patent.

Patented Apr. 11, 1911.

To -all whom it may concern:

Be it known that I, PHILIP YENesT, a citizen of the United States, and aresident of the city of New York, Laurel. Hill, borough of Queens, inthe county of Queens and State of New York, have invented a new andImproved Interlocking Brick, of which the following is a full, clear,and exact description.

The object of the invention is to provide a new and improvedinterlocking brick, more especially designed for use as a fire brickinthe lining of boiler furnaces and the like, and arranged to insure asecure and firm interlocking of successive courses well as interlockingof the bricks in the same course, to hold the same from shifting in anydirection. For this purpose each brick is provided on each face with atransverse groove and a transverse ridge, of which the ridge on one faceis directly opposite the groove on the other face.

A practical embodiment of the invention is represented in theaccompanying drawings forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure 1 is a perspective view of a number of interlocked bricks; Fig. 2is a face view of part of a wall. formed of interlocked bricks; and Fig.3 is a perspective view of one of the bricks.

The brick, made of tire clay or other suitable material, has the facesA, A, the sides A N andthe ends A .t The face A is provided near one endwith a transverse grooved} and near the other end with a transverseridge C, of approximately the same shape in cross section as that of thegroove ii. The other face A of the brick is provided with a similartransverse groove B and. a transverse ridge C, but the latter isdirectly opposite the groove ll and the groove i3 is directly oppositethe ridge (1. The renters ol' the grooves and ridges l3, (1 and l, arespaced about one-fourth of the length of the brick from the ends A", A5.so that when the bricks are interlocked, that is with the ridges (l, lof oncln-ick engaging the (mi'rcsponding groorcs ll. B on bricks of thenext. course, then the bricks in the smizeessive courses break joints,as indicatcd in Fig. 2. However, the bricks may be laid one on top ofthe other, as indicated in Fig. 1, without the bricks breaking joints.

The side A of each brick is provided with a lateral enlargement D, thesaid enlarge ment preferably having at one end a shoulder approximatelyperpendicular to the edge of the brick and inclining and merging at anangle at the other end into the edgeof the brick, as plainly indicatedin Fig. 3, and the opposite side A is provided with a reccss E, similarin shape to the lateral en largeinent D. The enlargement D and therecess E of each brick extend between the corresponding groove Band theridge C and the ridge C and the groove B, as plainly indicated in Fig.3, so that adjacent bricks in one course have their enlargements Dinterlocking with the recesses E to hold the bricks against lengthwisedisplacement. The ends A A of each brick are plain and each brick is ofapproximately the same rectangular shape as the bricks now used for thesame purpose.

By reference to Fig. 2 it will be noticed that in alternate courses thebricks are reversed to interlock and to break joints.

From the foregoing it will be seen that the bricks readily interlock inthe same courses, and the bricks in successive courses are likewiseinterlocked to insure the for1nation of an exceedingly secure all orlining, in which the bricks are not liable to fall out, as is so.frequently the case in linings of ordinary bricks as heretoforeconstructed.

llaving thus described my invention, 1 claim as new and desire to secureby Letters .latcnt:

A brick of the character specified, having on one side edge intermediatethe ends of the brick a lateral enlargen'ient provided at one end with ashoulder substantially perpendimdar to the brick edge and merging withthe brick at the other end at an angle to the edge and having a recesson the op positc edge in alincment with the enlargement and shaped tofit the enlargement of the adjacent brick, said brick having on each ofits opposite faces a transverse ridge and a transverse gI'OOVG, theridge on one face being opposite and in alinement with the groove on theother face and being of approximately the same cross section as thegroove, the said ridge and groove being on name to this specification inthe presence of opposite sides of the center of the brick and twosubscribing wltnesses. being approximately half Way between the saidcenter and the adjacent end, and the PHILIPYENGST' enlargement and therecess being between \Vitnesses: the ridges and the grooves. MARTINMCDONALD,

In testimony whereof I have signed my CHARLES RUDDEN.

